<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    :root {
      --loading-grey: #ededed
    }

    body {
      background-color: '#f6f6f6';
      font-family: Arial, Helvetica, sans-serif;
      font-size: 15px;
      display: flex;
      align-items: center;
      justify-content: space-evenly;
      min-height: 100vh;
    }

    .card{
      width: 320px;
      background-color: #ffffff;
      border-radius: 6px;
      overflow: hidden;
      box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.12);
    }
    .image {
      height: 200px;
    }
    .image img {
      display: block;
      width: 100%;
      height: inherit;
      object-fit: cover;
    }

    .content {
      padding: 2rem 1.8rem;
    }

    h4 {
      /* 上边 左边右边 下边 */
      margin: 0 0 1rem;
      font-size: 1.5rem;
      line-height: 1.5rem;
    }

    .description {
      font-size: 1rem;
      line-height: 1.4rem;
    }

    .loading .image,
    .loading h4,
    .loading .description {
      background-color: var(--loading-grey);
      /* 
        默认从上到下
        可以设置为到右边
       */
      background: linear-gradient(
          100deg,
          rgba(255, 255, 255, 0) 40%,
          rgba(255, 255, 255, .5) 50%,
          rgba(255, 255, 255, 0) 60%
        ) var(--loading-grey);
      background-size: 200% 100%;
      background-position-x: 180%;
      animation: 1s loading ease-in-out infinite;
    }

    .loading h4 {
      min-height: 1.6rem;
      border-radius: 4px;
      animation-delay:0.05s;
    }

    .loading .description {
      min-height: 4rem;
      border-radius: 4px;
      animation-delay:0.08s;
    }

    @keyframes loading {
      to {
        background-position-x: -20%;
      }
    }
  </style>
</head>
<body>
  <div class="card">
    <div class="image">
      <img src="https://assets.codepen.io/2002878/wake-up-and-code.jpg" alt="">
    </div>
    <div class="content">
      <h4>CodingStartup</h4>
      <div class="description">
        Lorem ipsum dolor, sit amet consectetur adipisicing elit. Ex quasi enim facere commodi omnis...
      </div>
    </div>
  </div>

  <div class="card loading">
    <div class="image">

    </div>
    <div class="content">
      <h4></h4>
      <div class="description">

      </div>
    </div>
  </div>
</body>
</html>